Thank you for your reply, I have tried your suggestions. This message did not appear after I turn off the Apple watch.

Thank you for sharing, this message will not appear after I turn off the Apple watch.

Thank you for your reply. As you said, after the message appears, wait for a while until the message disappears and the app can run. The time I waited is about five minutes. This waiting time is too long and delays the debugging process. After I turned off Apple watch, there was no such message and the running process went smoothly, so I think it should be the communication between Xcode and Apple watch that caused this issue. I want to know how to disconnect the communication between Apple watch and Xcode, because it is not needed for me. Thanks!